com.google.appengine.tools.mapreduce

Interface Counter

public interface Counter

Counter is an integer variable that is aggregated across multiple shards. Can be used to do statistical calculations.

Method Summary

Methods

Modifier and Type	Method and Description
String	getName()
long	getValue()
void	increment(long delta) Increment counter.

Method Detail

getName

String getName()

Returns:

counter name.

getValue

long getValue()

Returns:

counter value. This is the value only in the current shard. It doesn't include contributions from other shards, if accessed from within mapper/reducer.

increment

void increment(long delta)

Increment counter.

Parameters:

delta - increment delta. Can be negative.